body {
  background-color: #f3f3f3;
  overflow-x: hidden;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
.App {
  width: 100vw;
}

.todolist {
  box-sizing: border-box;
  width: 100vw;
  padding: 20px;
  padding-right: 340px;
  display: flex;
}

.todolist >section {
  margin: 0 20px;
  width: calc(100% / 3 - 40px);
  display: flex;
  flex-direction: column;
}

.todoform {
  width: 260px;
  height: 100vh;
  background-color: #fff;
  position: fixed;
  right: 0;
  top: 0;
  padding: 20px;
}

.todoform form {
  width: 100%;
}
.todoform form >input,button {
  height: 30px;
}
.todoform form >textarea {
  min-height: 60px;
  resize: none;
}
.todoform form >* {
  width: 100%;
  margin: 20px 0;
  border: none;
  border-bottom: solid 0.5px #ddd;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
.todoform form >button {
  background-color: #00cc47;
  border-radius: 15px;
  outline: none;
  border: none;
  color: #fff;
  cursor: pointer;
}